Siemens 6ES7132-6HD01-0BB1 Relay Output Module

SIMATIC ET200SP RQ 4×120VDC…230VAC/5A NO ST Relay Output Module

Distributed IO ET200SP, 4-channel normally-open digital relay output module, contact isolated type

✅ Model Code Interpretation

6ES7: SIMATIC S7 Automation System

132: ET200SP Digital Output Module

6HD01: 4-channel relay output, 120VDC~230VAC, 5A normally open

0BB1: Single pack (1 unit per box); `2BB1` = 10-piece bulk pack

📋 Key Technical Specifications

🧩 Features

1. Relay dry contact isolation: Galvanic isolation between PLC low-voltage side and load high-voltage side. Suitable for solenoid valves, contactors, indicator lamps and other AC loads.
2. Substitute value: When communication fails or CPU stops, output state can be preset in TIA Portal: hold / reset to 0 / set to 1.
3. Channel status LEDs + module diagnostic LED for fault alarm.
4. Separate base & electronic module design: Hot-swappable electronics while wiring remains on base for easy maintenance.

⚙️ Typical Application Scenarios

Control of 220VAC solenoid valves, small contactors, alarm lamps, fan start/stop in control cabinets

Not suitable for high-frequency switching applications (limited relay mechanical service life; cannot handle high-speed pulses)

Distributed remote IO station deployed with IM155-6 interface module

⚠️ Selection & Wiring Notes

1. Base unit must be BU B0 / BU B1 type, A-type bases are incompatible; recommended BU20-P16+A0+2B.
2. Relay contacts are passive dry contacts. Load power is not supplied by module backplane, external power supply required.
3. Inductive loads (contactor coils) are recommended to connect varistor / freewheeling diode in parallel to extend relay service life.
4. 5A per channel is rated current; pay attention to heat dissipation when all 4 channels run at full load simultaneously.

📌 Alternative & Derivative Models

6AG1132-6HD01-7BB1: SIPLUS wide-temperature conformal coated version, -40~+70℃, for harsh environments (chemical industry, outdoor)

Domestic alternatives: ET200SP compatible 4-channel normally-open 5A relay modules. Verify base compatibility and diagnostic telegram.

Application Scenarios for 6ES7132-6HD01-0BB1 (ET200SP 4-Channel Relay Output Module)

Core features: Passive dry contacts, channel isolation; max. 5A for resistive loads, max. 2A for inductive loads; supports 24V~230V AC/DC loads; PROFINET distributed remote IO. Ideal for low-frequency switching control requiring galvanic isolation between strong and weak circuits.

1. Industry-specific Applications
2. Machinery Manufacturing (Most Common)

220VAC pneumatic & hydraulic solenoid valve control (cylinder, hydraulic valve on/off)

Drive coils of small AC contactors to indirectly control fans, pumps, conveyors

Equipment alarm lights, audible & visual alarms, panel indicator lamps

Door interlock, guard door signal output, equipment enable signal

Applicable: Packaging machines, machine tools, production lines, injection molding machines, textile machinery remote IO stations

2. Process Automation / Water Treatment

Remote field cabinet: 220V solenoid valves, dosing pumps, drain valves, agitator start/stop control

Field instrument power switching, warning lights, on-site audible & visual alarms

Water tank level interlock output; remote stations deployed at different plant locations

Advantage: Relay isolation prevents field high-voltage interference from coupling into PROFINET bus

3. HVAC & Building Automation

AC220V air damper actuators, electric butterfly valve on/off control

Contactor coil control for fans, exhaust fans, water pumps

Fire linkage signal output, on-site alarm indication

4. Energy, PV & Power Auxiliary Control

Switchgear auxiliary circuit, relay loop switching, alarm contact output

Small heater, dehumidifier on/off control

Signal isolation transfer: Convert PLC low-voltage signals to dry contacts for 3rd-party systems (DCS, relay protection)

1. Supported Load Types
2. AC220V solenoid valves, indicator lamps, buzzers
3. AC220V contactor / intermediate relay coils
4. Resistive loads: heating tapes, incandescent lamps (≤5A)
5. DC24V~DC120V DC loads (dry contacts work for both AC and DC)
6. Passive contact output for hard-wired interlock with other control systems

III. Unsuitable Applications

1. ❌ High-frequency switching: Mechanical relay has limited service life, not for multiple operations per second. Use transistor DQ modules for high frequency.
2. ❌ Direct drive of high-power motors (only drives contactor coils, not main motor circuit)
3. ❌ Inductive load current exceeding 2A (solenoid & contactor are inductive loads; varistor / freewheeling diode required to absorb back EMF)
4. ❌ Safety circuits (this module is non-failsafe. F-RQ failsafe modules are required for emergency stop and safety gate circuits)
5. ❌ High inrush current loads (contact erosion risk; each channel needs external 6A max. fast fuse protection)
6. Architecture Characteristics

ET200SP distributed IO: This module is mounted in remote field enclosures away from the main PLC and connected via IM155-6 PROFINET interface module.

Load wiring for 220VAC is routed locally, reducing long-distance high-voltage cables

Relay isolation protects PLC low-voltage system and improves EMC immunity

Substitute value configurable in TIA Portal: Output state can be defined for bus interruption or CPU stop to ensure safe equipment status

ET200SP Digital Output Module Selection Comparison Sheet

Compare 6ES7132-6HD01-0BB1 (RQ 4-channel relay output) vs common transistor DQ modules

1. Core Parameter Comparison Table

1. When to select 【6ES7132-6HD01-0BB1 Relay Module】

✅ Recommended

1. Load voltage is AC220V, no extra intermediate relay required on site
2. Galvanic isolation required, heavy field interference, prevent high voltage from damaging PLC IO bus
3. Need passive dry contact output for hard-wired interlock to 3rd-party DCS / protection relays
4. Low switching frequency (triggered every few minutes/hours, not frequent on/off)
5. Mixed loads: both AC220V and DC loads up to 120V

❌ Not Recommended

1. Frequent switching: multiple start-stop per second (rapid contact wear and shortened lifetime)
2. Pure DC24V loads with large point count requirement (transistor modules cheaper, higher channel density)
3. High-speed pulse & motion control output (relay cannot generate pulses)
4. SIL safety circuits (Failsafe F-series modules required)

III. When to select 【Transistor DQ Module】

✅ Recommended

1. All loads are DC24V, frequent switching (continuous actuation of cylinder solenoids)
2. Requirement for high-speed switching signals or pulse outputs
3. Large I/O point count, high channel density to save cabinet space
4. Field loads are low-current DC components without isolation requirement

❌ Not Recommended

1. AC220V loads: must add external intermediate relays
2. Severe field high-voltage interference without isolation; risk of IO module burnout
3. Quick Selection Rule

Load: AC220V, low frequency, isolation required → 6ES7132-6HD01-0BB1

Load: DC24V, frequent operation → Transistor DQ (6BH01 for many points / 6BD20 for high per-channel current)

1. Additional Selection Notes
2. Inductive loads (solenoid valves, contactors) need absorption components: varistor in parallel for AC loads, freewheeling diode for DC loads to suppress back EMF and extend contact life.
3. Relay module base color code CC40, not interchangeable with transistor DQ base CC01.
4. Cost reference: Relay modules usually cost more for same channel quantity. However, overall system cost may be lower when eliminating external intermediate relays.
5. Failure characteristics: Relay contacts risk sticking; transistor modules mostly fail by breakdown with no mechanical sticking risk.
6. Special Alternatives

Failsafe output: 6ES7136-6DB00-0CA0 (F-DQ for safety circuits)

Solid-state relay output (no moving contacts, suitable for high-frequency AC switching): ET200SP RQ solid-state relay models